Uninstall an Older Infinity Workflow Visual Studio Extension (.vsix)
If you installed a previous version of the extension, you need to uninstall it. If this is your first time installing the .vsix, then skip to the next section. To uninstall, select Tools\Extension Manager… from the Visual Studio 2010 main menu, and then select the extension and uninstall.
After you uninstall the extension, close Visual Studio 2010.